21214222331311 has 4 divisors (see below), whose sum is σ = 21275008069000. Its totient is φ = 21153436593624.

The previous prime is 21214222331297. The next prime is 21214222331327. The reversal of 21214222331311 is 11313322241212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21214222331311 - 2²⁷ = 21214088113583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21214222331311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214222331381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30392868321 + ... + 30392869018.

It is an arithmetic number, because the mean of its divisors is an integer number (5318752017250).

Almost surely, 2^{21214222331311} is an apocalyptic number.

21214222331311 is a deficient number, since it is larger than the sum of its proper divisors (60785737689).

21214222331311 is an equidigital number, since it uses as much as digits as its factorization.

21214222331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60785737688.

The product of its digits is 3456, while the sum is 28.

Adding to 21214222331311 its reverse (11313322241212), we get a palindrome (32527544572523).

Subtracting from 21214222331311 its reverse (11313322241212), we obtain a palindrome (9900900090099).

The spelling of 21214222331311 in words is "twenty-one trillion, two hundred fourteen billion, two hundred twenty-two million, three hundred thirty-one thousand, three hundred eleven".